Articles tagged with Dark Matter
Astronomers using the Hubble Space Telescope have discovered a blue supergiant star called Icarus, which is the farthest individual star observed. The team used gravitational lensing to magnify the star's light, revealing its true nature and providing insights into dark matter theory.
Researchers have discovered the farthest individual star ever seen, Icarus, 9 billion light years away, by magnifying its brightness with the gravity of a larger object. This breakthrough study uses gravitational lensing to exclude the possibility that dark matter is made up mostly of large black holes.
Researchers discovered a unique galaxy, NGC 1052-DF2, lacking most of its dark matter. The galaxy is as large as the Milky Way but contains only 1/200th the number of stars, leading to its classification as an ultra-diffuse galaxy.
Researchers found a galaxy with almost no dark matter, challenging the long-held idea that galaxies start with dark matter halos. The team discovered 10 globular clusters in NGC1052-DF2, which could account for all the mass in the galaxy.
Researchers using Hubble Space Telescope have discovered a galaxy with minimal to no dark matter, contradicting long-held assumptions about its presence in galaxies. The ultra-diffuse galaxy NGC 1052-DF2 contains at least 400 times less dark matter than predicted for a galaxy of its mass.
Researchers have discovered a galaxy that is almost completely devoid of dark matter, forcing them to rethink the formation of galaxies. The team found that the stars in NGC1052-DF2 can account for all its mass, leaving little room for dark matter.
Scientists have found a unique galaxy that contains almost no dark matter, a finding that challenges the standard ideas of how galaxies work. The galaxy, called NGC1052-DF2, has a mass similar to that of the Milky Way but only a fraction of the expected dark matter.
Astronomers have discovered a new material that could directly detect dark matter particles, expanding the search scope to unexplored mass ranges. The material detects electrons recoiling from collisions with dark matter particles and operates near absolute zero.
Researchers propose a new particle detector design using doped gallium arsenide crystals that can scan for dark matter signals at lower energies. The technology has the potential to detect particles in the mass range measured in millions of electron volts, expanding the search for dark matter.
Researchers at University of Houston are working with DarkSide program to detect dark matter using weakly interacting massive particles (WIMPs) and liquid argon technology. The team has improved the sensitivity of their detector, DarkSide-50, by switching to low-radioactivity liquid argon.
A team of researchers has created a comprehensive dark matter map, indicating inconsistent halos with the standard cosmological model. The findings could hold new clues to understanding the accelerating expansion of the Universe.
Researchers at Arizona State University and Tel Aviv University have discovered dark matter using radio wave signals from the early universe. The detection provides direct proof that dark matter exists and is composed of low-mass particles.
Physicist Andrea Pocar and his team at UMass Amherst designed a key part of the DarkSide-50 detector, achieving high sensitivity in detecting WIMPs. The detector's double-phase argon technique shows promise in searching for low-mass WIMPs.
A new analysis of ultracold neutron measurements imposes strict constraints on the interactions of axions with nucleons and gluons. Researchers discovered frequency changes in neutrons that could be indicative of an 'axion wind', suggesting a specific direction of movement for these hypothetical particles.
Several Berkeley Lab scientists will present talks on various topics, including sequence-based approaches to plant microbiomes, new ways to search for dark matter, and developments in advanced bioenergy. The presentations aim to advance our understanding of quantum materials and their potential applications, as well as the scientific p...
A team of astronomers from the University of Basel has found that satellite galaxies around Centaurus A co-rotate within disc-shaped planes, a phenomenon that challenges the standard model of cosmology. This discovery suggests that these systems are not isolated cases but part of a widespread pattern.
An international team of astrophysicists has provided the first clue to the speed of dark matter, finding that it matches the movement of the least heavy metal-rich stars. This breakthrough could help shed light on why direct detection experiments have failed to detect dark matter particles.
The largest X-ray galaxy cluster ever discovered contains the mass of three million billion suns and is composed of two colliding clusters, with most mass hidden in dark matter. Hubble's observations also show that the hot gas is being torn from the dark matter during the collision.
The GAMBIT Collaboration has developed software tools to analyze data from various experiments and compare them with predictions of new theories. This comprehensive analysis narrows the search areas for 'new physics' and eliminates models whose predictions have not been confirmed.
Observations of two massive galaxies using ALMA radio telescope reveal they formed 780 million years after the Big Bang, challenging previous understanding. The discovery provides new insights into galaxy formation and dark matter's role in assembling large structures.
Astronomers find two giant galaxies from the Big Bang era, forming stars at record rates and surrounded by massive dark matter halos. Their rapid star formation is triggered by close encounters with smaller companions.
Researchers have discovered two colossal galaxies from the early universe, each containing around 273 billion suns' worth of gas and dust. The combined mass of these galaxies is nearly as large as physically possible at that time, suggesting a vast amount of dark matter surrounding them.
Scientists use a simulation program called DaMaSCUS to study how dark matter particles interact with normal matter, potentially affecting detector performance. The researchers found that if dark matter interacts strongly with atoms, deep site detectors may struggle to detect it.
Recent observations of four colliding galaxies in the Abell 3827 cluster suggest that SIMPs, strongly interacting massive particles, may be a new candidate for the universe's elusive dark matter. SIMPs would interact strongly with themselves via gravity but weakly with normal matter, overcoming a major failing of WIMP theory.
The DAMPE mission has published its first scientific results, presenting precise measurements of cosmic ray electron flux and a spectral break at ~0.9 TeV. This data may help clarify the connection between the positron anomaly and particle dark matter annihilation or decay.
Researchers combined Hubble and Gaia data to measure the proper motion of 15 stars in the Sculptor Galaxy, revealing an unexpected preference in direction. The findings question current models of dark matter halos, suggesting that assumptions on star populations may be invalid.
Astronomers used Hubble and Gaia data to directly measure the 3D motions of stars in the Sculptor Dwarf Galaxy, achieving accuracy better than previous measurements. The results provide insights into dark matter distribution and test the cosmological model.
The HAWC observatory reveals two rapidly spinning stars are unlikely to be the source of an excess of anti-matter particles near Earth. The findings contradict a simple explanation involving nearby collapsed stars called pulsars, leaving room for exotic processes involving dark matter.
Scientists at the University of Sussex have disproved the existence of a specific type of axion, an important candidate for 'dark matter', across a wide range of its possible masses. The study limits the characteristics that these particles could have, sending physicists back to the drawing board in their hunt for dark matter.
The latest analysis of BaBar experiment's data limits hiding places for dark photon, ruling out its explanation for muon spin discrepancy and supporting the existence of dark matter. Researchers refine search for dark photons using decade-old particle collider data.
Researchers from University of Nevada, Reno used GPS satellites to search for dark matter clumps in the shape of walls or bubbles extending far beyond the solar system. The team found no evidence but ruled out a vast region of possibilities for this type of dark matter model, bringing them closer to defining its nature and composition.
Researchers propose a new method for directly detecting dark matter by exploiting the interaction between superfluid helium and potential dark matter particles. The strategy involves a tub of helium and a positively charged metal pin array to amplify the tiny energy signature of a released atom, enabling the detection of single atoms a...
A new cosmic picture of the universe's history shows a close agreement with previous findings, leaving little room for new physics that could reveal dark matter and dark energy. The results support the standard model of Big Bang cosmology, but scientists remain hopeful that new observations will offer clues about what lies beyond.
Astronomers analyzed 10 galaxy clusters using Hubble data and found their brightest cluster galaxies wobble around the center of mass, inconsistent with current dark matter models. This result may indicate new physics is at work, requiring a reevaluation of fundamental physics to solve the mystery of dark matter.
Recent study finds that galaxy clusters' density is smaller than predicted, and brightest cluster galaxies wobble, indicating a shallower central density. This suggests the existence of exotic forms of dark matter.
The Cherenkov Telescope Array's (CTA) updated science case outlines the observatory's major science themes and potential discoveries in astrophysics and fundamental physics. CTA will explore extreme environments, probe cosmic voids, and search for dark matter, with the potential for unexpected breakthroughs.
A team of physicists led by Hai-Bo Yu propose a new theory that dark matter particles strongly collide with each other in the inner halo of galaxies, explaining diverse galactic rotation curves. This self-interacting dark matter model thermalizes the inner halo, tying ordinary and dark matter distributions together.
Researchers map galaxy motions to locate denser matter in clusters and filaments, revealing the cosmic velocity web's structure. The new definition provides strong confirmation of gravitational attraction's role in universe development.
Physicists at Johannes Gutenberg University Mainz introduce a new mechanism explaining dark matter's observed quantity, suggesting instability in its early universe phase. This alternative to the WIMP theory could be tested in future experiments on gravitational waves and CERN's LHC particle accelerator.
The Standard Model of cosmology has been tested to its limits by the Dark Energy Survey, with results showing that the universe clumps and expands as predicted by our best models. The survey's researchers analyzed light from 26 million galaxies to study how structures have changed over the past 7 billion years.
The Dark Energy Survey (DES) collaboration has made the most accurate measurement ever made of the present large-scale structure of the universe. The new result rivals the precision of cosmic microwave background measurements, supporting the theory that dark matter and dark energy make up 26% and 70% of the cosmos, respectively.
Researchers have produced new maps of dark matter dynamics in the Universe, revealing detailed information about matter streams and velocities. This study uses legacy survey data to build on previous research and provides insights into the nature of dark matter.
Researchers used data from the intergalactic medium to narrow down what dark matter could be, casting doubt on 'fuzzy dark matter' and lending credence to 'cold dark matter.' The findings could inform ongoing efforts to detect dark matter directly.
Researchers analyzed the interaction of cosmic web with distant quasar light to reveal properties of dark matter. The results support Cold Dark Matter theory and reject Fuzzy Dark Matter model.
Researchers propose a theory that predicts dark matter annihilation rates vary by galaxy size and time. This study suggests dark matter could consist of multiple particles interacting through a yet-undiscovered low-mass particle.
Researchers will construct an advanced dark matter detector based on magnetic sensors, aiming to detect invisible mass in the universe. The project brings together experts in various fields to observe dark matter directly.
The University of Zurich has simulated a gigantic catalogue of 25 billion virtual galaxies from 2 trillion digital particles using the revolutionary code PKDGRAV3. This simulation will help optimize the observational strategy of the Euclid satellite, which aims to investigate dark matter and dark energy.
Researchers at University of Arizona discover diffuse hydrogen gas surrounding Milky Way, accounting for large part of galaxy's baryonic mass. This finding confirms predictions from simulations and provides new insights into the nature of dark matter.
Researchers at the University of Waterloo have captured the first composite image of a dark matter bridge connecting galaxies. This achievement confirms predictions that galaxies are tied together through a cosmic web connected by dark matter, which has been largely undetectable until now.
Researchers have used archival data from NASA's New Horizons mission to measure visible light from other galaxies, giving an upper limit to the amount of light in the cosmic optical background. The findings offer promise for future astronomy measurements from the outer solar system.
A new RIT study confirms the coexistence of satellite galaxies and dark matter, shedding light on a long-standing debate. The research supports the current cosmological paradigm by showing that the vast polar structure of dwarf galaxies is an unstable feature that formed later in the galaxy's evolution.
A Hungarian-American team suggests that standard models of the universe fail to account for its changing structure, eliminating the need for dark energy. The new model shows how the formation of complex structures affects the expansion, providing an alternative explanation for the acceleration.
A team of astronomers found that distant galaxies were dominated by normal matter, with dark matter playing a smaller role. The study used the KMOS and SINFONI instruments to measure galaxy rotation velocities and created an average rotation curve, which also showed a decreasing velocity trend away from the centers of the galaxies.
A Yale-led team has created one of the highest-resolution maps of dark matter ever produced, providing a detailed case for its existence. The map, derived from Hubble Space Telescope Frontier Fields data, closely matches theoretical predictions and offers insights into the universe's structure and galaxy formation.
The PICO Collaboration has achieved a significant leap forward in the search for dark matter, establishing a new world-leading limit for weakly interacting massive particles (WIMPs). The experiment's results will guide future detection efforts and inform the design of more sensitive experiments.
The Hyper Suprime-Cam Subaru Strategic Program has released high-quality images of a large swath of the night sky, containing 100 million stars and galaxies. The data will allow researchers to search for previously undiscovered galaxies and study dark matter, which can be detected via its effects on gravity.
Fermi data reveals concentrated gamma rays at Andromeda's center, sparking speculation about dark matter. The unusual distribution may be caused by unknown sources or the presence of dark matter.
A team led by Case Western Reserve University researchers found a tight correlation between observed acceleration and gravitational acceleration from visible mass in various galaxy types. This discovery suggests a universal law governing galactic systems, similar to Kepler's planetary law. The findings require rethinking dark matter an...
Researchers using advanced methods have measured corotation radii in over 100 galaxies, finding that many bars are rotating slower than previously thought. The team's findings suggest that dark matter halos may not be necessary to explain the observed behavior of galaxy bars.
Scientists have found that toroidal magnets can be used to detect axions, one of the dark matter particle candidates. The CAPPuccino submarine, a type of toroidal magnet, has been designed to amplify the energy of photons generated from the axion-photon interaction.